Wrench.



J. c. PUGH.

WRENCH.

APPLICATION FILED APR.29 1913- 1, 147, 1 1 9. I Patented July 20, 1915.

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@WM I 6552/ M, a?) 7 5 Z 11 y W JOHN C. PUGI-I, OF WESTBROOK, MAINE.

WRENCH.

Specification of Letters Patent.

PatentedJuly 20, 1915.

Application filed April 29, 1913. Serial No. 764,390.

To all whom it may concern Be it known that 1, JOHN C. PUGH, a c1t1- zen of theUnited States, residing at VVestbrook, in the county of Cumberland and State of Maine, have invented new and useful Improvements in Wrenches, of which the following is a specification. p

This invention relates to wrenches, and has for an object to provide means for effecting quick adjustments of the sliding aw.

Another object of the invention is to provide a wrench'wherein the sliding jaw, after being approximately adjusted to its Work, may be further adjusted, so that a most effective purchase of both jaws can be obtained against the work. i r

In the drawings: Figure 1 is a side new of the wrench with parts in section, and illustrating the sliding jaw adjusted to the desired position with relation to the fixed jaw. Fig. 2 is a side view of the wrench, showing an approximate ad ustment of the sliding jaw, and illustrating a release position of the sliding key. Fig. 3 is aview similar to Fig. 1, showing a slightly modified form of the invention. Fig. 4 is a sec tion on the line 44 of Fig. 1.

The wrench illustrated in Figs. 1, 2 and 4 comprises a shank 1, which is provided on one of its edges with a longitudinal series of teeth 2. At one end, the shank is provided with an integral jaw 3, while the oppos te end of the shank has attached thereto a suitable manipulating handle 4.

The sliding jaw 5 of the wrench includes a substantially yoke portion 6, in which is journaled a worm screw 7 The screw 1s disposed at one side of the toothed surface 2 of the wrench, and is movable with relation thereto in a manner to be hereinafter explained. The sliding jaw embraces the shank 1, and as illustrated, the arms 8 of the yoke portion of the sliding jaw are extended behind one edge of the shank 1, and provided with springs or equivalent keepers 9, whose locking extremities 10 are disposed directly in the path of a sliding key or looking member 11. This key is slidable against one of the longitudinal edges of the shank 1, and at its sides it carries integral lugs 12, having lateral portions 13 which extend into the longitudinal grooves 14 upon the opposite sides of the shank. The outer surface of the key has formed therein recesses 15 to receive the locking extremities 10 of the springs 9. The arms 8 of the sliding aw are provided at points adjacent to the free terminals of the springs 9 with beveled surfaces 16 to accommodate lateral movements of the springs under the wedge action of the sliding key.

In use the sliding key 11 is released from the springs 9 and entirely drawn from beneath the arms 8 of the sliding jaw. The worm 7 is then free from the toothed surface 2 of the shank ofthe wrench, and the operator may then grasp the sliding jaw to effect an approximate adjustment of the same with relation to the fixed jaw 3. After this adjustment is obtained, the sliding key 11 is adjusted under the arms 8 of the sliding jaw, and operatively engaged with the locking terminals 10 of the springs 9. It is understood that wedge-like movements of the key 11 beneath the arms 8 of the sliding jaw will move the latter with relation to the shank 1 to cause a positive engagement of the worm 7 with the teeth 2. After the approximate adjustment of the sliding jaw is made, finer adjustments of the jaw can be obtained through rotating the worm screw 7 upon the toothed surface of the shank, whereby the companion jaws of the wrench are made to securely impinge against the sides of the work to be operated upon. When the key 11 is released from the sliding jaw, the locking terminals 10 of the springs of thisjaw engage against one of the longitudinal edges of the shank, as shown in Fig. 2. This spaces the adjacent portion 17 from the shank and disposes such portion in a direct path with the beveled surface 18 of said sliding key. This construction is desirable, with a view to facilitating the proper assemblage of the cooperating parts of the wrench.

In the modified form of the invention shown in Fig. 3, the sliding jaw 19 is substantially identical with the sliding jaw in the preferred embodiment, the difference being in the construction of the arms 20 of the worm yoke. These arms are provided with substantially wedge surfaces 21, against which the inclined surface 22 of the sliding wedge key 23 is adapted to engage. Each of the sliding keys is provided with a suitable manipulating projection 24.

lVhat is claimed is:

A device of the character described comprising a handle, a shank fixedly mounted upon one end of the handle and having teeth formed upon its longitudinal edge, a

adapted to engage with said teeth, said slide being fitted around said shank and having one of its ends, spaced from the edge of said shank opposite to said teeth when said worm gear engages said teeth, the slide being enlarged in a plane with said grooves, two spring fingers secured flatly at their ends upon the inner surface of said slide a V- shaped terminal formed upon each of said spring fingers pointing toward said grooves, one of said V-shaped terminals projecting into one of the slots of said slide and. the other terminal projecting rearwardly exteriorly thereof in alinement with said first named V shaped terminal, a key fitted in the enlargement of said slide slidably engaging the outer edge of said shank, tenons carried by said key fitting the opposite grooves of said shank in slidable relation and an angular handle formed upon said key, said key being provided with V-shaped notches spaced apart the distance between said V-shaped terminals, being formed with a bevel at one end, and engaging said-spring fingers to hold said worm gear in contact with said teeth. y

In testimony whereof I afiix my signature in presence. of two witnesses.

v JOHN C. PUGH. Witnesses:

LLEWELLYN BARTON, ALBERT WV. OBRIEN.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of IPatents,

Washington, D. 0. 

